Flutter - Get the Unique Device ID

import 'package:flutter/material.dart';
import 'package:device_info/device_info.dart';

void main() {
    runApp(const DeviceIDApp());
}

class DeviceIDApp extends StatelessWidget {
    const DeviceIDApp({Key? key}) : super(key: key);

    @override
    Widget build(BuildContext context) {
        return MaterialApp(
            debugShowCheckedModeBanner: false,
            theme: ThemeData(primarySwatch: Colors.green),
            home: const DeviceIDScreen(),
        );
    }
}

class DeviceIDScreen extends StatefulWidget {
    const DeviceIDScreen({Key? key}) : super(key: key);

    @override
    _DeviceIDScreenState createState() => _DeviceIDScreenState();
}

class _DeviceIDScreenState extends State<DeviceIDScreen> {
    String _deviceID = 'Loading...';

    @override
    void initState() {
        super.initState();
        _getDeviceID();
    }

    Future<void> _getDeviceID() async {
        DeviceInfoPlugin deviceInfo = DeviceInfoPlugin();
        AndroidDeviceInfo androidInfo = await deviceInfo.androidInfo;
        setState(() {
            _deviceID = androidInfo.androidId;
        });
    }

    @override
    Widget build(BuildContext context) {
        return Scaffold(
            appBar: AppBar(
                title: const Text('Device ID App'),
            ),
            body: Center(
                child: Text(
                    _deviceID,
                    style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 24),
                ),
            ),
        );
    }
}